Development of growth technique of shape-controlled crystal for alloy materials with difficult workability

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05551
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Metal making/Resorce production engineering
• Research Institution: Tohoku University
• Principal Investigator: Yokota Yuui 東北大学, 未来科学技術共同研究センター, 准教授 (60517671)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 一方向凝固 / 難加工性合金 / イリジウム / ルテニウム

Outline of Final Research Achievements

Innovative method acceptable for production of Iridium (Ir) and Ruthenium (Ru) metal fibers with high melting point and poor workability is developed using an alloy-micro-pulling-down (A-μ-PD) method and ceramic crucibles with sufficient mechanical and thermal shock resistance. As-grown (as-solidified) Ir and Ru fibers were approximately 1 mm in diameter and their lengths exceed 15 and 0.3 m, respectively. Both Ir and Ru fibers were composed of number of elongated grains oriented along a growth direction which is attributable to the unidirectional solidification. The flexibility and oxidation resistance of the Ir fiber grown by the A-μ-PD method was considerably improved as compared to a commercial Ir wire made by wire-drawing process.

Free Research Field

材料科学